docs: def _adds_dels_sucpred(self, cache, branch, turn, tick, *, stoptime=None):
          """Take the successors or predecessors cache and get nodes added or deleted from it
  
          Operates like ``_get_adds_dels``.
  
          """
          added = set()
          deleted = set()
          for node, nodes in cache.items():
              addidx, delidx = self._get_adds_dels(nodes, branch, turn, tick, stoptime=stoptime)
              if addidx and not delidx:
                  added.add(node)
              elif delidx and not addidx:
                  deleted.add(node)
          return added, deleted